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<pre><span class="sourceLineNo">001</span>package org.apache.log4j;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import java.lang.reflect.Field;<a name="line.3"></a>
<span class="sourceLineNo">004</span>import java.lang.reflect.Method;<a name="line.4"></a>
<span class="sourceLineNo">005</span><a name="line.5"></a>
<span class="sourceLineNo">006</span>import org.apache.log4j.helpers.ThreadLocalMap;<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>public class MDCFriend {<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>        public static void fixForJava9() {<a name="line.10"></a>
<span class="sourceLineNo">011</span>                if (MDC.mdc.tlm == null) {<a name="line.11"></a>
<span class="sourceLineNo">012</span>                        MDC.mdc.tlm = new ThreadLocalMap();<a name="line.12"></a>
<span class="sourceLineNo">013</span>                        MDC.mdc.java1 = false;<a name="line.13"></a>
<span class="sourceLineNo">014</span>                        setRemoveMethod(MDC.mdc);<a name="line.14"></a>
<span class="sourceLineNo">015</span>                }<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>        }<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>        private static void setRemoveMethod(MDC mdc) {<a name="line.19"></a>
<span class="sourceLineNo">020</span>                try {<a name="line.20"></a>
<span class="sourceLineNo">021</span>                        Method removeMethod = ThreadLocal.class.getMethod("remove");<a name="line.21"></a>
<span class="sourceLineNo">022</span>                        Field removeMethodField = MDC.class.getDeclaredField("removeMethod");<a name="line.22"></a>
<span class="sourceLineNo">023</span>                        removeMethodField.setAccessible(true);<a name="line.23"></a>
<span class="sourceLineNo">024</span>                        removeMethodField.set(mdc, removeMethod);<a name="line.24"></a>
<span class="sourceLineNo">025</span>                } catch (NoSuchMethodException e) {<a name="line.25"></a>
<span class="sourceLineNo">026</span>                } catch (SecurityException e) {<a name="line.26"></a>
<span class="sourceLineNo">027</span>                } catch (NoSuchFieldException e) {<a name="line.27"></a>
<span class="sourceLineNo">028</span>                } catch (IllegalArgumentException e) {<a name="line.28"></a>
<span class="sourceLineNo">029</span>                } catch (IllegalAccessException e) {<a name="line.29"></a>
<span class="sourceLineNo">030</span>                }<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>        }<a name="line.32"></a>
<span class="sourceLineNo">033</span>}<a name="line.33"></a>




























































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